Re: How to avoid constant propagation into functions?

[Georg-Johann Lay <avr@xxxxxxxx>]

On 05.12.2016 17:33, Tim Prince wrote:
> > Hi, I just came across a small test program that propagates a constant
> > value from a function to a callee, even though the callee has attribute
> > "noclone".
> >
> > From the gcc documentation I would conclude that "noclone" should
> > prevent such propagations?
> >
> > https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-g_t_0040code_007bnoclone_007d-function-attribute-3345
> >
> > noclone
> >     This function attribute prevents a function from being
> >     considered for cloning -- a mechanism that produces specialized
> >     copies of functions and which is (currently) performed by
> >     interprocedural constant propagation.
> >
> >
> > I see this with gcc 5.4 (x86_64) and current trunk.
> >
> > Johann
>
> Maybe you want -fno-inline-functions ?

The function has __attribute((noinline,noclone)).  This is not sufficient?

Johann